Han conquest of Dian

Han campaigns against Dian
Part of the Southward expansion of the Han dynasty
The expansion of Han dynasty in 2nd century BC
Date 135 BC, 109 BC, others Location Yunnan Result 135 BC Jianwei commandery and trade routes established by Han 109 BC Han settlement and migration southward[1] Cultural assimilation and displacement of the Dian by the Han Empire Dian annexed by the Han Empire and Yizhou commandery established
Belligerents
Han Empire	Dian Kingdom
Strength
Unknown	30,000

The Han conquest of Dian was a series of military campaigns and expeditions by the Western Han dynasty recorded in contemporary textual sources against the Dian Kingdom in modern-day Yunnan. Dian was placed under Western Han rule in 109 BC, after Emperor Wu of Han dispatched an army against the kingdom as the empire expanded southward.